I am a member of a non profit society and the e-mails they send are blocked at the source. Seems they are on some kind of black list for e-mails going to hotmail, sympatico.ca, live, outlook and there might be others that use the hotmail pathways. 

All mail is fine for videotron.ca and gmail. 

The domain is Xytra.net .. http://xytra.net/ How can they be cleared of this false tag.

Thanks 

Suzanne